Combined automatic switch and regulator



June 24, 1930. F. MEPNZEL COMBINED AUTOMATIC SWITCH AND REGULATOR Filed July 19, 1926 the excitation winding Patented June 24, 1930 UNITED STATES IBIEBICH mam, OF STUTTGABT, GERMANY, ASSIGNOB TO ROBERT BOSCH AKTIEN- GESELLSCI-IAIT, OF STUT'IGART, GERMANY COMBINED AUTOMATIC SWITCH AND REGULATOR Application filed July 19, 1926,

The invention relates to a combined automatic switch and voltage regulator in which a single armature operates the switch and the regulator and is particularly adapted for the lighting sets of motor vehicles.

More especially the voltage regulator is of the vibration type. The primary ob ect of the invention resides therein that the combined switch and regulator is so designed as to have a plurality of regulating stages so that even on considerable increase of voltage the regulation of the excitation of the dynamo is possible. Other objects and features will become apparent from the subsequent descri tion.

A preferre embodiment of the invention is shown diagrammatically and by way of example in the single figure of the accompanying drawing.

A indicates the, armature of a dynamo, B

for the same and a resistance 111 801188 with the excitation winding. A ma et casing D contains a current coil 1 an a voltage coil 2 connected thereto and in the inner chamber of the casing is located an armature E suspended by flanges 3 and 1 from two fiat springs and 6. This armature, which an annular shaped extension 7 which yields to magnetic attraction of a ange 8 of the casrn D, is formed at one end with a plate 9 who constitutes the vibrating contact element of a vibration volta -regulator. A fixed abutment F is locate at the one end of the easing D, while a movable carria e element H consisting of two contact bloc 11 and 12 insulated from one another is suspended by a flat spring 10 between the abutment and the armature E. The member F constitutes also the stationary contact element of the automatic switch, while the pro ect1ng portion of the member 12 ad acent the member F constitutes the movable contact element of the automatic switch. Theprmecting portion of the member 12 ad acent the center of the vibrating contact element 9 constitutes a complementary contact therefor. The member 11 constitutes another complementary contact for the vibrating contact element 9. The carnage element H Serial 1%. 123,540, and in Germany September 1 1, 192:.

thus carries the movable contact of the automatlc switch, and two contacts complementary to the vibrating contact element 9.

Two spiral spring 13 and 14, the former bearing against the flange 4 of the armature, and the latter against the frame of the abutment F act on the carriage element H.

The spring 13 is stronger than 14 and isv also electrically insulated from the contact block 11.

The current coil 1 is connected to one brush of the dynamo A by a lead 15, 16 and to the contact block 12 by a lead 17 whilst the contact block 11 and also the second brush of the dynamo and the free end of the voltage coil 2, the series resistance C and a battery G are grounded. The lead 18 to the magnet casing D is connected between the excitation winding B and the series resistance C. The ole of the battery G not connected to round is connected with the abutment F. he spring 10 and the abutmentF are insulated from the casing D.

Immediately a potential difference is set up by the dynamo and the excitation of the coils 1 and 2 causes the projection 7 of the armature to be moved towards the right attracted by the flan e 8. The carriage element H is also a ected by the spri 13. The contact between. the plate 9 an the contact element 11 previously maintained by th1s spring is still maintained. With a suitable voltage of the dynamo the armature E and also the carriage element H move sufiiciently far to ensure contact between the element 12 and the abutment F whereby the battery G is connected throu h the circult F, 12, 17, 1, 16, 15 with t e dynamo A, B.

With increase of voltage the armature E moves further to the right. As the carr1age elem ent H is'prevented from taking part in this further movement by the fixed abutment F, the armature plate 9 is thus separated from thecontact element 11 and the series resistance C is inserted in the clrcuit of the field winding B. Accordingly the process of regulation between the two contact elements 9 and 11 begins after the manner of a vibration regulator, the series resistance o being alternately switched in and out.

If the voltage increases still further the armature E finally moves so far to the right that the plate 9 contacts with the contact element 12 and the excitation windin B is short circuited through 16, 1, 17, 1 9,

If the speed of rotation is reduced to such of the dynamo is less than the current flows in the reverse direction from the battery thro h the current coil 1-so that the action oft e voltage coil 2 is completely eliminated and the armature E is drawn back by the springs 13 and 14. The carriage element H also must artake in this movement with the result t at the contact between the abutment F and the contact element 12 is again broken and the battery G is cut off from the dynamo.

The automatic switch and the vibration regulator can be combined to form a very cheap and compact construction in the form of construction described, which further particularly shows an advantage over known regulating switches in that the two contacts of the automatic cut-on switch do not move in any way during the operation of the I f the dynamo re ator vibrating contacts.

the foregoing description, I have shown but one form of the embodiment of my invention, but many modifications therefrom may be made without departing from the s irit of the invention, and accordingly I 0 not limit myself to the specific form shown herein.

I claim:

1. In a combined automatic switch and vibration voltage regulator for generators, the combination of a. switch element, a vi bration voltage-regulator element, a single armature operating the switch and the regulator, and a plurality of separate regulating circuits controlled by the re lator at different times for the regulation of the voltage of a generator.

2. In a combined automatic switch and vibration voltage regulator for generators, the combination of a switch element, a vibration voltage-regulator element, a single armature operating the switch and the regulator, said regulator being arran ed to assume a plurality of control posi ions, one adapted to insert a resistance in the excitation circuit of a generator and another to render inoperative the excitation winding by shunting the same.

3. In a combined automatic switch and vibration voltage regulator for generators, the combination of a switch element, a vibration voltage-regulator element, a single armature operating the switch and the regulator, said vibration voltage-regulator comprising a vibrating contact element, and a an extent hat the volta e the battery vo t-i 1,7es,sa1

movable contact element mounted independently of said armature and adapted to be moved by it into a stationary position wherein it acts as a contact element complementary to the vibrating contact element of the regulator.

4. In a combined automatic switch and voltage-regulator, the combination with a single armature operating the switch and the regulator, of a pluralit of control stages of the regulator, a movab e contact element provided with multi le contacts, mounted independently of sai armature and ada ted to be moved by-it, and flat sprin s or suspending all the movable elements, a 1 contacts being mounted in line with one another.

5. In 'a combined automatic switch and vibration voltage-regulator for generators, the combination of a switch having a movable and a stationary contact, a single armature, a movable carriage element mounted independently of the armature and adapted to be moved by the armature in its attractive movement from a normal position to an extreme operated position, said carriage element carrying the movable contact and arranged to move it into engagement witlt the stationary contact, an abutment arranged to stop the movement of the carriage element after engagement of said contacts, determining its extreme operated position, a non-vibrating regulating contact carried by said carriage element and a vibrating regulating contact mounted on the armature and normally in engagement with said non-vibrating contact and arranged to be moved out of engagement with said non-vibrating contact in t e further attractive movement of the armature after engagement of the carriage element with the abutment.

6. The combination claimed in claim 5 in which the stationary switch contact is arranged to act as the said abutment.

In a combined automatic switch and vibration voltage-regulator for generators, the combination of a switch having a movable and a stationary contact, a single armature, a movable carriage element mounted' independently of the armature and adapted to be moved by the armature in its attractive movement from a normal position to an extreme operated position, said carriage element carrying the movable contact and arranged to move it into engagement with the stationary contact, an abutment arranged to stop the movement of the carriage element after engagement of said contacts, determining its extreme operated position, first and second non-vibrating regulating contacts carried by the carriage element, a vibrating regulator contact mounted on the armature normally in engagement with said first non-vibrating contact and arran ed to be moved out of engagement therewith in the further attractive movement of the armature after engagement of the carriage element with the said abutment, and to be moved into contactwith the'said second non-vibrating contact in the further attractive movement of the armature after disengagement of the vibrating contact from said first non-vibrating contact.

8. The combination as claimed in claim 7 in which the said stationary switch contact is arranged to act as the abutment.

9. In a combined automatic switch and vibration voltage-regulator for generators,

the combination of a single armature, a mom.

able carriage element mounted independently of the armature and adapted to be moved by it, a plurality of contacts carried by said carriage and insulated from each 'other,.

other contacts complementary to said insulatcd contacts and mounted for relative mm cmeint therewith in a common straight line at right angles to the planes of the contacting surfaces of said contacts.

In testimony whereof I have hereunto affixed my signature.

FRIEDRICH MENZEL. 

